JP6359842B2 - Constant voltage supply system and power supply device - Google Patents

Description

  The present invention relates to a constant voltage supply system, an electronic device, a power supply device, and a constant voltage supply method.

  In Patent Document 1, when the variable output AC / DC power supply unit 44 that supplies power to the mobile terminal 2 supplies DC power to the mobile terminal 2, the power cable 25 is connected using a PLC (Power Line Communication) circuit. The mobile terminal 2 transmits a power supply information transmission request to the form terminal 2 via the power cable 25 and returns the power supply information described in the nonvolatile memory element 41 to the variable output AC / DC power supply unit 44 via the power cable 25. Then, a technique is described in which the variable output AC / DC power supply unit 44 varies the set value of the DC output voltage based on the received power supply information and supplies power to the mobile terminal 2.

  In Patent Document 1, in a power supply system that supplies DC power to an electronic component in an information processing apparatus, a voltage supplied to the electronic component 6 from the DC stabilized power supply 1 via a wiring is required for the electronic component 6. In order to always maintain the voltage at a predetermined voltage, the supply voltage to the electronic component 6 is detected as a voltage between the sense terminals T72 and T73 of the pseudo voltage detection circuit 7, and this detected voltage is connected to the sense terminals T72 and T73 and the wiring. Is transmitted to the stabilized DC power supply 1 via the sense terminals T11 and T14 of the stabilized DC power supply 1 connected to each other through the DC stabilized power supply 1 so that the transmitted voltage becomes a voltage required for the electronic component 6. A technique for controlling the output voltage of the integrated power supply 1 is described.

JP 2009-287771 A JP-A-61-288727

  However, in the technique described in Patent Document 1, a PLC that causes a time delay in information transmission is used for communication of power supply information between the variable output AC / DC power supply unit 44 and the portable terminal 2. Therefore, the DC voltage required by the mobile terminal 2 can be set. However, since it takes time to transmit the voltage change, the variable output AC / DC immediately follows the voltage change received by the mobile terminal 2. There is a problem that the voltage output from the power supply unit 44 cannot be stabilized.

  Further, in the technique described in Patent Document 2, when the sense terminals T72 and T73 and the senses T11 and T14 are connected to each other, the external noise or the like enters the wiring, and the pseudo voltage detection circuit 7 passes through the wiring. There is a problem that the voltage transmitted to the DC stabilized power supply 1 may fluctuate due to the noise, and an accurate voltage may not be transmitted.

  The objective of this invention is providing the constant voltage supply system, electronic device, power supply device, and constant voltage supply method which solve the problem mentioned above.

The constant voltage supply system of the present invention is
A circuit group composed of at least one electronic circuit to which direct current power is supplied via a power supply line, and a voltage value of a voltage component of direct current power supplied via the power supply line at a frequency proportional to the voltage value. An electronic device including supply voltage information transmission means for sending an alternating current to the power supply line;
Based on the value of the voltage, supply voltage information receiving means for outputting a voltage proportional to a frequency that is the same as or proportional to the frequency of the alternating current, the alternating current sent to the power supply line by the supply voltage information transmitting means And a DC power supply means for adjusting a voltage value of a voltage component of DC power supplied to the power supply line.

The electronic device of the present invention is
A circuit group consisting of at least one electronic circuit to which DC power is supplied from a power supply device via a power supply line;
Voltage detection means for detecting a voltage value of a voltage component of DC power supplied to the circuit group via the power supply line;
In order to adjust the voltage value of the voltage component of the DC power supplied to the power supply line by the power supply device, an AC current having a frequency proportional to the voltage value detected by the voltage detection means is passed through the power supply line. VF conversion means for sending to the power supply device;
A band rejection filter or a low-pass filter that prevents the alternating current sent from the VF converter to the power supply line from being supplied to the circuit group.

The power supply device of the present invention is
Current-voltage conversion means for converting an alternating current having a frequency proportional to the voltage value of the voltage component of the direct current power supplied from the power supply line to the electronic device into an alternating voltage having a frequency that is the same as or proportional to the frequency of the alternating current When,
A band-pass filter or a high-pass filter that passes the AC voltage;
FV conversion means for outputting, as a sense voltage, a voltage proportional to the frequency of the AC voltage that has passed through the band-pass filter or the high-pass filter;
DC power supply means for adjusting a voltage value of a voltage component of DC power supplied to the power supply line based on the value of the sense voltage.

The first constant voltage supply method of the present invention comprises:
Supplying an alternating current having a frequency proportional to the voltage value of a voltage component of a DC power component supplied from a power supply device to a circuit group including at least one electronic circuit included in the electronic device via a power supply line Sending to the line;
The voltage value of the voltage component of the DC power supplied to the power supply line is adjusted based on the voltage value proportional to the frequency that is the same as or proportional to the frequency of the AC current. Adjusting step.

  including.

The second constant voltage supply method of the present invention is a voltage for detecting a voltage value of a voltage component of DC power supplied from a power supply device to a circuit group including at least one electronic circuit included in an electronic device via a power supply line. A value detection step;
In order to adjust the voltage value of the voltage component of DC power supplied from the power supply device to the power supply line, an AC current having a frequency proportional to the voltage value detected in the voltage value detection step is supplied to the power supply line. And a sending step for sending to the power supply device.

According to a third constant voltage supply method of the present invention, an alternating current having a frequency proportional to a voltage value of a voltage component of direct current power supplied to an electronic device from a power supply line is equal to or proportional to the frequency of the alternating current. A current-voltage conversion step for converting into an alternating voltage having:
DC power supply means for adjusting a voltage value of a voltage component of DC power supplied to the power supply line based on a voltage value proportional to the frequency of the AC voltage.

  The present invention has an effect that a DC voltage supplied to an electronic device can be stabilized.

It is a block diagram which shows the 1st Embodiment of this invention. It is a figure which shows the operation | movement flow of the 1st Embodiment of this invention. It is a block diagram which shows the 2nd Embodiment of this invention. It is a block diagram which shows the 3rd Embodiment of this invention.

  Next, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a block diagram showing a first embodiment of the present invention.

  Referring to FIG. 1, the present embodiment includes a constant voltage supply system 1.

  The constant voltage supply system 1 receives AC power from a commercial AC power supply (not shown) (AC input), converts the AC power into DC power having a voltage component of a predetermined voltage value, and outputs the power. 10, an electronic apparatus 8 such as an information processing apparatus, and a power supply line 5 for supplying DC power output from the power supply apparatus 10 to the electronic apparatus 8.

  The power supply device 10 includes an AC / DC converter 9, a supply voltage information receiving unit 101, and a second output terminal 19.

  AC / DC converter 9 includes a sense terminal 14 and a first output terminal 15. The AC / DC converter 9 receives AC power from a commercial AC power supply, converts the AC power from the first output terminal 15 into DC power having a voltage component of a predetermined voltage value, and outputs the DC power. The AC / DC converter 9 is also called a DC power supply unit.

  The supply voltage information receiving unit 101 includes a current-voltage conversion unit 6, a band pass filter 18, and an FV conversion unit 7. The current-voltage conversion unit 6 includes a shunt resistor 13 and a voltage amplifier 11.

  The electronic device 8 includes a circuit group 12 including at least one electronic circuit, a supply voltage information transmission unit 102, and an input terminal 16.

  Supply voltage information transmission unit 102 includes a band rejection filter 17, a voltage detection unit 2, and a VF conversion unit 3. The power supply line 5 is connected to the input terminal 16, and DC power is supplied from the AC / DC converter 9 via the current / voltage converter 6.

  Each electronic circuit in the circuit group 12 is supplied to the input terminal 16 and supplied with DC power via the band rejection filter 17.

  The voltage detector 2 measures the voltage value of the voltage component of the DC power supplied to the circuit group 12.

  The VF conversion unit 3 converts the voltage into an alternating current having a frequency proportional to the voltage value measured by the voltage detection unit 2 and outputs the alternating current.

  The band rejection filter 17 prevents the alternating current output from the VF conversion unit 3 from propagating to the circuit group 12. That is, the band rejection filter 17 blocks the passage of alternating current having a frequency within a predetermined frequency range, and the VF conversion unit 3 is configured to output only an alternating current having a frequency within the predetermined frequency range. . Instead of the band rejection filter 17, a low-pass filter that allows a current having a frequency equal to or lower than a predetermined frequency to pass may be used.

  The power supply apparatus 10 inputs AC power from a commercial AC power supply (AC input), converts the AC power into DC power having a voltage component of a predetermined voltage value, and converts the DC power to the second output terminal 19. To the power supply line 5.

  The current-voltage converter 6 converts the alternating current output from the VF converter 3 into an alternating voltage having a frequency that is the same as or proportional to the frequency of the alternating current, and outputs the alternating voltage.

  The current-voltage conversion unit 6 includes, for example, a shunt resistor 13 and a voltage amplifier.

  The shunt resistor 13 has one end connected to the first output terminal 15 of the AC / DC converter 9 and the other end connected to the second output terminal 13 that is the output terminal of the power supply device 10. The value of the voltage between both ends is a value proportional to the value of the current flowing through the power supply line 5.

  One input terminal of the two input terminals of the voltage amplifier 11 is connected to one end of the shunt resistor 13, and the other input terminal is connected to one end of the shunt resistor 13, whereby the voltage amplifier 11 is connected to both ends of the shunt resistor 13. The voltage between them is amplified and output to the band pass filter 18.

  The band pass filter 18 passes only an AC voltage having a frequency within the predetermined frequency range and outputs the AC voltage to the FV converter 7. Instead of the band pass filter, a high pass filter that passes only an AC voltage having a frequency equal to or higher than a predetermined frequency may be used.

  The FV conversion unit 7 converts the voltage into a voltage proportional to the frequency of the AC voltage received from the band pass filter 18 and outputs this voltage as a sense voltage to the sense terminal 14 of the AC / DC converter 9 via the sense voltage line 4. .

  Next, the operation of this embodiment will be described with reference to the flowchart shown in FIG.

  The DC power output from the AC / DC converter 9 of the power supply device 10 is supplied to the supply voltage information transmitter 102 via the current-voltage converter 6, the second output terminal 19, the power supply line 5, the input terminal 16, and the band filter 17. Is supplied to the voltage detector 2 (step S001 in FIG. 2). As described above, the voltage detector 2 measures the voltage value of the voltage component of the DC power supplied in this way (step S002).

  Next, the VF conversion unit 3 receives the voltage value measured by the voltage detection unit 2, and outputs an alternating current having a frequency proportional to the voltage value (step S003).

  The alternating current output from the VF conversion unit 3 is transmitted to the current / voltage conversion unit 6 of the supply voltage information receiving unit 101 via the power supply line 5 (step S004).

  Next, as described above, the current-voltage conversion unit 6 converts the alternating current transmitted from the VF conversion unit 3 into an alternating voltage having a frequency that is the same as or proportional to the frequency of the alternating current, and passes through the band. It outputs to the filter 18 (step S005).

  Next, the AC voltage output from the voltage amplifier 11 of the current-voltage conversion unit 6 passes through the band pass filter 18 and is supplied to the FV conversion unit 7 (step S006).

  Next, the FV converter 7 outputs a voltage proportional to the frequency of the supplied AC voltage (step S007).

  Next, the voltage output from the FV converter 7 is transmitted as a sense voltage to the sense terminal 14 of the AC / DC converter 9 via the sense voltage line 4 (step S008).

As a result, the AC / DC converter 9 controls the voltage output from the first output terminal 15 in accordance with the value of the sense voltage input to the sense terminal 14 (step S009).
Thereafter, the processing returns to step S001, and a series of processing from steps S001 to S009 is repeated.

  That is, when the value of the voltage supplied to the circuit group 12 is different from the desired voltage value, the voltage value of the sense voltage is obtained when the voltage of the circuit group 12 is the voltage of the desired voltage value. Therefore, the AC / DC converter 9 outputs the voltage to the first output terminal 15 so that the voltage supplied to the circuit group 12 becomes a desired voltage value. Adjust the output voltage value.

  As described above, the present embodiment has an effect that the voltage supplied to the electronic apparatus 8 such as the information processing apparatus can be stabilized.

  The reason for this is that a change in the voltage supplied to the electronic device 8 is transmitted to the power supply device 10 using a current that is less susceptible to external noise than the voltage, and the output voltage of the power supply device 10 is controlled. Because it was.

  The present invention can also be applied to a communication means between an uninterruptible power supply, a power supply that performs peak assist, and an electronic device.

  Next, a second embodiment of the present invention will be described in detail with reference to the drawings.

  FIG. 3 is a block diagram showing a second embodiment of the present invention.

  Referring to FIG. 3, the present embodiment includes an electronic device 108 and a power supply device 100.

  The power supply apparatus 100 includes a current-voltage conversion unit 106, an FV conversion unit 107, a band pass filter or high pass filter 118, and a DC power supply unit 109.

  The current-voltage conversion unit 106 has an alternating current having a frequency proportional to the voltage value of the voltage component of the direct-current power supplied from the power supply line 105 to the electronic device 108, the same or proportional to the frequency of the alternating current. Convert to AC voltage.

  A band-pass filter or high-pass filter 118 passes the AC voltage.

  The FV converter 107 outputs a voltage proportional to the frequency of the AC voltage that has passed through the band-pass filter or the high-pass filter 118 as a sense voltage.

  The DC power supply unit 109 adjusts the voltage value of the voltage component of the DC power supplied to the power supply line 105 based on the value of the sense voltage.

  As described above, the present embodiment has an effect that the voltage supplied to the electronic apparatus 108 such as the information processing apparatus can be stabilized.

  The reason for this is that a change in voltage supplied to the electronic device 108 is transmitted to the power supply device 100 using a current that is less affected by external noise than the voltage, and the output voltage of the power supply device 100 is controlled. Because it was.

  The present invention can also be applied to a communication means between an uninterruptible power supply, a power supply that performs peak assist, and an electronic device.

  Next, a third embodiment of the present invention will be described in detail with reference to the drawings.

  FIG. 4 is a block diagram showing a third embodiment of the present invention.

  Referring to FIG. 4, the present embodiment includes an electronic device 8 and a power supply device 100.

  The power supply apparatus 100 includes a supply voltage information receiving unit 101 and a DC power supply unit 109.

  The electronic device 8 includes a circuit group 12 and a supply voltage information transmission unit 102. The power supply device 100 and the electronic device 8 are connected by a power supply line 105.

  The supply voltage information transmission unit 102 sends an AC current having a frequency proportional to the voltage value of the voltage component of the DC power supplied to the circuit group 12 via the power supply line 105 to the power supply line 105. .

  The supply voltage information receiving unit 101 outputs the alternating current sent from the supply voltage information transmitting unit 102 to the power supply line 105 as a sense voltage, which is proportional to the frequency that is the same as or proportional to the frequency of the alternating current.

  The DC power supply unit 100 adjusts the voltage value of the voltage component of DC power supplied to the power supply line 105 based on the value of the sense voltage.

  As described above, the present embodiment has an effect that the voltage supplied to the electronic apparatus 8 such as the information processing apparatus can be stabilized.

  The reason for this is that a change in the voltage supplied to the electronic device 8 is transmitted to the power supply device 100 using a current that is less susceptible to external noise than the voltage, and the output voltage of the power supply device 100 is controlled. Because it was.

  The present invention can also be applied to a communication means between an uninterruptible power supply, a power supply that performs peak assist, and an electronic device.

DESCRIPTION OF SYMBOLS 1 Constant voltage supply system 101 Supply voltage information receiving part 102 Supply voltage information transmission part 2 Voltage detection part 3 VF conversion part 4 Sense voltage line 5 Power supply line 6 Current voltage conversion part 7 FV conversion part 8 Electronic device 9 AC / DC converter DESCRIPTION OF SYMBOLS 10 Power supply device 11 Voltage amplifier 12 Circuit group 13 Shunt resistor 14 Sense terminal 15 1st output terminal 16 Input terminal 17 Band stop filter 18 Band pass filter 19 2nd output terminal 100 Power supply device 105 Power supply line 106 Current voltage conversion part 107 FV Conversion Unit 108 Electronic Device 109 DC Power Supply Unit 118 Band Pass Filter or High Pass Filter

Claims (2)

A constant voltage supply system comprising a power supply device and an electronic device connected to the power supply device by a power supply line,
The power supply device
DC power supply means for converting input AC power into DC power and supplying DC power to the electronic device via the power supply line;
Supply voltage information receiving means connected to the DC power supply means,
The electronic device is
A group of circuits including at least one electronic circuit and receiving DC power supplied by the DC power supply means;
Supply voltage information transmitting means connected to the circuit group,
The supply voltage information transmitting means includes
Voltage detection means for detecting a voltage value of a voltage component of DC power supplied to the circuit group by the DC power supply means;
VF conversion means for sending an alternating current having a frequency proportional to the voltage value detected by the voltage detection means to the supply voltage information reception means via the power supply line;
A band rejection filter that prevents an alternating current sent to the supply voltage information receiving means from being supplied to the circuit group by the VF conversion means,
The supply voltage information receiving means includes
Current-voltage conversion means for converting an alternating current sent from the VF conversion means to the supply voltage information receiving means via the power supply line into an alternating voltage having a frequency proportional to the frequency of the alternating current;
A band-pass filter that passes the AC voltage converted by the current-voltage conversion means;
FV conversion means for outputting, as a sense voltage, a voltage proportional to the frequency of the AC voltage that has passed through the band-pass filter,
The DC power supply means adjusts a voltage value of a voltage component of DC power supplied to the circuit group based on a sense voltage output from the supply voltage information receiving means . A power supply device connected to an electronic device by a power supply line,
DC power supply means for converting input AC power into DC power and supplying DC power to the electronic device via the power supply line;
Supply voltage information receiving means connected to the DC power supply means,
The supply voltage information receiving means includes
The alternating current delivered through the power supply line to the supply voltage information receiving means by the electronic device, a current-voltage converter for converting an AC voltage having a frequency proportional to the frequency of the AC current,
A band-pass filter for passing the converted AC voltage by the current-voltage conversion means,
Anda FV converting means for outputting a voltage proportional to the frequency of the AC voltage having passed through the band-pass filter as a sense voltage,
The DC power supply means adjusts a voltage value of a voltage component of DC power supplied to the electronic device based on a sense voltage output from the supply voltage information receiving means.

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